package 对象;

public class student {
    private int id;
    private String name;
    private int age;

    //无参数
    public student(){}
    //全部参数
    public student(int id, String name, int age) {
        this.id = id;
        this.name = name;
        if (age < 0) {
            System.out.println("参数错误，年龄不能小于零！");
        }else {
            this.age = age;
        }
    }

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public int getAge() {
        return age;
    }

    public void setAge(int age) {
        if (age < 0) {
            System.out.println("参数错误，年龄不能小于零！");
        }else {
            this.age = age;
        }
    }
}
